Self-timed random access memory chip

Details Self-timed random access memory chip Self-timed random access memory chip

1985-01-25

1987-12-08

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 1200

Patent

active

047121904

ABSTRACT:
A self-timed random access memory circuit is designed on a single monolithic integrated circuit chip. The chip includes a random access memory including addressable storage locations, address decoding circuitry, data input and output circuitry and write enable circuitry. In addition, the chip includes input latches connected to chip input terminals which store data, address and operation control signals from off-chip circuitry in response to a timing signal, also from the off-chip circuitry. Also in response to the timing signal, an output latch on the chip stores data from the random access memory for transmission to output terminals, where the data is available to the off-chip circuitry. The input and output latches permit the self-timed random access memory circuit to perform in a pipelined manner. In addition, the chip includes circuitry that generates the control signals, in response to the latched control signals, with the correct timing for controlling the random access memory, obviating the necessity of the system designer designing a system including the chip having to design off-chip control circuitry with the required timing.

REFERENCES:
patent: 3778784 (1973-12-01), Karp
patent: 4110842 (1978-08-01), Sarkissian
patent: 4328558 (1982-05-01), Musa et al.
patent: 4335459 (1982-06-01), Miller
patent: 4396980 (1983-08-01), Hingarh

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